Izboljšanje prenosa toplote pri vrenju s strukturiranimi grafenskimi prevlekami

zaključna naloga Razvojno raziskovalnega programa I. stopnje Strojništvo

Miran Hohkraut (Author), Iztok Golobič (Mentor), Matevž Zupančič (Co-mentor)

Abstract

V delu obravnavamo izboljšanje prenosa toplote pri vrenju na strukturiranih grafenskih nanosih. Iz pregledane literature smo ugotovili, da raziskovalni interesi za uporabo grafenskih slojev in grafenskih disperzij pri študiju vrenja narašča eksponentno. Pri uporabi grafenskih nanosov se kritična gostota toplotnega toka v primerjavi z golo površino poveča tudi za več kot 150%. Povečanje je odvisno od debeline grafenskega nanosa ali koncentracije grafenove disperzije. Zasnovali smo novo merilno progo za izvajanje eksperimentov vrenja pri povišanih tlakih na podlagi delovanja dušika v vrelni komori. Eksperimentalnih rezultatov vrenja na grafenskih nanosih pri povišanih tlakih do danes namreč še ni zaslediti. V sklopu tega smo že izbrali in dobavili ustrezne grafenske nanose, ki bodo omogočali izvedbo meritev mehurčkastega vrenja.

Keywords

diplomske naloge;vrenje;grafen;prenos toplote;strukturirane prevleke;kritična gostota;toplotni tok;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[M. Hohkraut]
UDC:	536.24:620.1(043.2)
COBISS:	16923931
Views:	614
Downloads:	168
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Improving the heat transfer during boiling with structured graphene coatings
Secondary abstract:	The paper deals with the improvement of heat transfer during boiling on structured graphene deposits. From the reviewed literature, we found that research interests in the use of graphene layers and graphene dispersions in fermentation studies are increasing exponentially. When using graphene coatings, the critical heat flux density is also increased by more than 150% compared to the bare surface. The increase depends on the thickness of the graphene coating or the concentration of graphene dispersion. We have designed a new measuring line for conducting boiling experiments at elevated pressures based on the action of nitrogen in the boiling chamber. The experimental results of boiling on graphene deposits at elevated pressures have not yet been observed. As part of this, we have already selected and delivered the appropriate graphene deposits, which will allow measurements of bubble boiling.
Secondary keywords:	boiling;graphene;heat transfer;structured coatings;critical heat flux;
Type (COBISS):	Final paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za strojništvo
Pages:	XII, 33 f.
ID:	11221986